题目

阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。Many people would feel surprised when they know I don't use a credit card. In fact, I did have a credit card. If it hadn't been for an embarrassing moment in a drugstore, I maybe still use one. But ever since then, I have formed a habit of keeping a record of the money I spent. And it was also from that moment that I learn to save.It was about 8 years ago when I was staring out in my human resources career. One day I ran into a drugstore before work to buy some medicine. After J picke用微粒的观点解释下列事实．（1）向气象气球中充入氢气，随着气球的上升，其体积逐渐变大．（2）贮存气体的容器必须具备的条件之一是不渗漏，而贮存氢气的容器要达到这一条件却非常困难．